Regulations of the Land Registration Article 117

Upon the application for the registration of mortgage or for the preparatory registration of mortgage according to the provisions of Article 513 of the Civil Code, the contractor shall apply jointly with the employer with the submission of documents prescribed by Articles 34 and 40 and the construction license or other documents indicating construction permits. However, if the agreement of contract has been publicly registered, the contractor may solely apply for registration, and the registration agency shall notify the employer with the result after the completion of registration.When the contractor applies for a preparatory registration of mortgage over the unfinished improvements, the registration agency shall compile a temporary building number and improvements register, and undertake registration in the other registered matters column of the descriptions section.
中文原文 土地登記規則第117條
承攬人依民法第五百十三條規定申請為抵押權登記或預為抵押權登記,除應提出第三十四條及第四十條規定之文件外,並應提出建築執照或其他建築許可文件,會同定作人申請之。
但承攬契約經公證者,承攬人得單獨申請登記,登記機關於登記完畢後,應將登記結果通知定作人。
承攬人就尚未完成之建物,申請預為抵押權登記時,登記機關應即暫編建號,編造建物登記簿,於標示部其他登記事項欄辦理登記。

English translation for reference only; the Chinese text prevails. Not legal advice.